Window treatment accessory



FIG. 1 is an enviromental perspective view of the claimed window treatment accessory;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a rear view thereof; and,

FIG. 6 is a left side view thereof (the right side view being a mirror image).

The broken line showing of a cut-away portion of a support rod in FIG. 1 and mounting holes in FIG. 3 are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a window treatment accessory, as shown and described. 